SMG2 and IOS56-64-v5405?

My Wii curently is 4.2U, followed the "Softmod for ANY 4.2 Wii!" FAQ to install HBC and the lot.

When I tried to play SMG2 (orignal) was sent to the System Update screen. Read some topics about this and found that the solution was installing IOS56-64-v5405, already did but the game still doesn't load and keeps sending me to the update screen. Now, anyone know what could probably be happening?

Or are there any steps for removing HBC and other stuff without leaving any trace so I can update the Wii? Only used this for playing some WiiWare games but I don't really use them anymore.